Angular 2 Components have a far better way of notifying parent Components that something has happened via events. There is no longer two-way data binding in Angular 2 in the same way we knew it in Angular 1.
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Component events with EventEmitter and "Output" in Angular 2
Angular 2 Components have a far better way of notifying parent Components that something has happened via events. There is no longer two-way data binding in Angular 2 in the same way we knew it in Angular 1.
Full article